Article of manufacture, vulcanized rubber



Patented July 28, 1,925.

UNITED STATES PATENT OFFICE.

MAX BOG-EMANN, OF ELBERFELD, PAUL IMHOFE, OF LEVER IKUSEN-ON-THE-RHINE, AND WILHELM SCHEPSS, F WIESDORF-ON-THE-R'HINE, GERMANY, ASSIGNORS TO FARBENFABRIKEN VORM. FRIEDR. 'IBAYER AND 00., OF LEVERKUSEN, NEAR CO- LOGNE-ON-THE-BHINE, GERMANY.

ARTICLE OF MANUFACTURE, VULCANIZED RUBBER.

No Drawing.

To all whom it may concern:

Be it known that we, MAX BooEMANN, PAUL IMHOFF, and WILHELM SoHEPss, citizens of Germany, residing at Elberfeld,

Leverkusen-on-the-Rhine, and Wiesdorf-onthe-Rhine, State of Prussia, Germany, have invented new and useful Improvements in a New Article of Manufacture, Vulcanized Rubber, of which the following is a specification. 7

In Patents 1,126,469 and 1,149,580 there are described processes for materially promoting the vulcanization of rubber by the use of bases, such as piperidine or its derivatives etc. I 1

We have now found that for this purpose dimer or polymer hydrogenated pyridines e. g. the dipiperidyl or polypiperidyl compounds see Berichte der deutschen chemischen esellschaft Vol. 46 (1913) page 1767) can advantageousl be used. These compounds are not mentioned in the above cited patents. They are obtained when pyridine compounds are reduced by electrolysis. As accelerators for vulcanization must practically be used in a powdered state the solid bases e. g. the gamma-gammadipiperidyl LE, H] \ir H 7 \CH:

H1 H1 \NH can be used directly.

The liquid bases e. g. the alpha-alpha dipiperidyl NE NH 319C :2 E E4 \1H9 to H H are best converted before use into a solid derivative e. g. by a treatment with carbon Application filed June 3, 1924. Serial No. 717,639.

disulfide into its dithiocarbamate (see Annales de Chlmie et de Physique, Serie III, Vol. 38, page88): 1 l

NH N C 8 i I 11011 CHa CH] H: CH1 c i C I J\ 1110 C 1 a lilac a H LHa 17H;

NH N H E Dior polymer-hydrogenated quinoline bases can also be used (see Zeitschrift fiir Elektrochemie? (1895) page 580).

The following example further illustrates the new process, the parts being by weight:

A mixture of 78 parts of para-rubber, 3.1 parts of sulfur, 9.4: arts of zinc oxide and 3 parts of dipiperi yl are vulcanized for 20-50 minutes under a pressure of 1.5 atmospheres. A well thoroughly vulcanized product results.

The tri-molecular hydroquinoline can also be used or other of the above mentioned com unds. E

0 course artificial caoutchouc can be used.

We claim:-

1. The process of producing a vulcanized rubber which comprises incorgorating into rubber a small amount of a imer hydro-' genated pyridine compound and heating the resulting product wit a vulcanizmg agent to effect vulcanization.

2. The process of producing a vulcanized rubber which comprises incor crating into rubber a small amount of a po ymer hydrogenated pyridine compound and heating the resulting product with a vulcanizing agent to efiect vulcanization.

3. The rocess of producing a vulcanized rubber w ich comprises incorporating into rubber a small amount of a salt of a dimer hydrogenated pyridine compound and heat ing the resulting product with a vulcanizing agent to elfect vulcanization.

4c. The process of producing a vulcanized into rubber a small amount of a salt of a po hydrogenated pyridine compound and heating the resulting product with a vulcanizing, agent to effect vulcanization.

5. The process of producing a vulcanized rubber which comprises incorporating into rubber a small amount of a di i eridyl base and heating the resulting pr not with a vulcanizing agent to effect vulcanization.

6. As a new article of manufacture a vulcanized rubber combined before vulcanization with a small amount of a dimer hydrogenated pyridine compound.

As a new article of manufacture a vulcanized rubber combined before vulcanization with a small amount of a polymer hydrogenated pyridine compound.

As a new article of manufacture a vulcanized rubber combined before vulcanization with a small amount of a salt of a dimer hydrogenated pyridine compound.

9. As a new article of manufacture a vul canized rubber comblned before vulcanization with a small amount of a salt of a polymer hydrogenated pyridine compound. In testimony whereof we have hereunto set our hands.

MAX BijGEMANN. PAUL IMHO'FF. WILHELM SGHEPSS. 

